Many cases, with circumstantial evidence have been and are prosecuted,with guilty findings being returned. This shouldn't scare you are at all.
So you think I'm stupid because my opinion differs from yours? I don't think the prosecution proved their case. I could not sentence someone to death when there's only circumstantial evidence. Maybe sentencing them to 25 to life, but not the death penalty. What irrefutable proof does anyone have that he did this? Judge Napolitano even said the prosecution didn't have a case.